I have owned this bike since 2014, and it has had the 685cc big bore kit professionally installed which improved the smoothness, the doohickey was also done at that time Since the upgrade, the engine has less than 1500 km on it, For the last 6 years the bike as been stored and was hoping to be able to return to riding, but after several hand surgeries, I have decided to let someone else enjoy the bike. Those who know this model know how reliable they are, a great solid dudal sport bike.